Images rejected for "Technical issues" - help feedback

[Davo M]

Hello. Once, a few days, I submitted a photoshoot and the moderators rejected several files. Previously, they accepted similar content from me, but this time they have been a bit harsh for me. I would appreciate constructive comments to try to understand the logic that has prevailed this time in the decision of the moderators. Thank you all.

[Abambo]

My guess:

• In the upper-right corner is kind of something.
• The pictures are missing contrast
• They are slightly noisy
• With the calculator, I would expect the calculator to be in focus.

And then there could be too much detail in the paper money: